Study on electromagnetic dynamic tunability of composite structure based on plasma periodic structure loading frequency selective surface

The plasma periodic structure has dynamic reconstruction characteristics having important practical significance in electromagnetic engineering applications. In this paper, a composite electromagnetic structure consisting of plasmas which are periodically arranged and frequency selective surface is proposed and researched. Based on the periodically arranged plasma columns, the frequency selective surface is introduced to study whether a photon-like effect will occur on EM waves propagation in the composite structure even a stronger dynamic tuning ability. The reflectivity between 1∼2GHz and 8∼12GHz was tested in a microwave dark room to study the influence of periodic plasma and frequency selective surface on incident electromagnetic waves with the free space method. A commercial electromagnetic software also was used to calculate the electric field at different frequency points, and study the mechanism of its interaction with electromagnetic waves. (paper)